Please be aware that Jakarta has multiple airports and that these results are for all airports serving the city.
The best month to fly between Jakarta and Surabaya is October and the most expensive month to fly is June. (Average prices, based on 179481 datapoints.)
The best day to arrive at Jakarta is Tuesday and it would be best to avoid Friday, as prices are on average 9.66% higher than on Tuesday. (Average prices, based on 895365 datapoints.)
The cheapest airline flying from Jakarta to Surabaya is Lion Air. They are 35% cheaper than Garuda Indonesia. (Average prices, based on 179533 datapoints.)
The best time to fly is at around 3. (Average prices, based on 199532 datapoints.)